The reward is chocolate.

Sonoo Yuzuko, age 22, was found deep in the forest. It seems she had somehow wandered into a different world. She spent a year living quietly in the forest. She still had no idea how to return home, but on the day winter began for the second time in relative peace, a white knight suddenly appeared before Yuzuko, and her peaceful daily life came to an end. Against her will, she leaves the forest, and her days of what seems like an otherworldly trip begin... ★This has been published as a book by Harper Collins Japan's Angelica★